package com.warren.core.io;

import cn.hutool.core.lang.Assert;
import com.warren.util.ClassUtils;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;

/**
 * @author warren
 * @create 2021-08-19 13:16
 * @Description classPath流操作
 */
public class ClassPathResource implements Resource {

    private final String path;

    private ClassLoader classLoader;

    public ClassPathResource(String path){
        this(path,(ClassLoader)null);
    }

    public ClassPathResource(String path,ClassLoader classLoader){
        Assert.notNull(path,"Path must not be null");
        this.path = path;
        this.classLoader = (classLoader != null ? classLoader : ClassUtils.getDefaultClassLoader());
    }

    @Override
    public InputStream getInputStream() throws IOException {
        InputStream is = classLoader.getResourceAsStream(path);
        if (is == null){
            throw new FileNotFoundException(
                    this.path + "connot be opened because it does not exit"
            );
        }
        return is;
    }
}
